Results 21 to 30 of about 1,478 (224)

NASA plans relevant to the study of circumstellar matter [PDF]

Symposium - International Astronomical Union, 1987
The Astrophysics program of the National Aeronautics and Space Administration of the United States emphasizes use of vehicles to obtain above-the-atmosphere observational advantages, including expanded electromagnetic frequency access, enhanced sensitivity resulting from reduced or eliminated atmospheric absorption of light and image smearing.
openaire   +1 more source

Zeeman tomography of magnetic white dwarfs. IV, The complex field structure of the polars EF Eridani, BL Hydri and CP Tucanae [PDF]

, 2007
Context. The magnetic fields of the accreting white dwarfs in magnetic cataclysmic variables (mCVs) determine the accretion geometries, the emission properties, and the secular evolution of these objects. Aims.
Gänsicke, B. T. (Boris T.), Euchner, F., Beuermann, K. (Klaus), Jordan, S. (Stefan), Reinsch, K. (Klaus)   +4 more
core   +1 more source

Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae

The Astrophysical Journal, 2023
Early-time light curves/spectra of some hydrogen-rich supernovae (SNe) provide solid evidence of the existence of confined, dense circumstellar matter (CSM) surrounding dying massive stars. We numerically and analytically study the radiative acceleration
Daichi Tsuna, Kohta Murase, Takashi J. Moriya   +2 more
doaj   +1 more source

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS)

Astronomy & Astrophysics
Context. Asymmetries in debris discs provide unique clues to understand the evolution and architecture of planetary systems. Previous studies of debris discs at (sub)millimetre wavelengths have suggested the presence of asymmetries in a wide variety of ...
Lovell J. B., Hales A. S., Kennedy G. M., Marino S., Olofsson J., Hughes A. M., Mansell E., Matthews B. C., Pearce T. D., Sefilian A. A., Wilner D. J., Zawadzki B., Booth M., Bonduelle M., Brennan A., del Burgo C., Carpenter J. M., Cataldi G., Chiang E., Fehr A., Han Y., Henning Th., Krivov A. V., Luppe P., Marshall J. P., Mac Manamon S., Milli J., Moór A., Wyatt M. C., Ertel S., Jankovic M. R., Kóspál Á., MacGregor M. A., Matrà L., Pérez S., Weber P.   +35 more
doaj   +3 more sources

The extended atmosphere and circumstellar environment of the cool evolved star VX Sagittarii as seen by MATISSE [PDF]

, 2022
Context. VX Sgr is a cool, evolved, and luminous red star whose stellar parameters are difficult to determine, which affects its classification. Aims: We aim to spatially resolve the photospheric extent as well as the circumstellar environment.
Montargès, M., Millour, F., Chiavassa, A., Matter, A., Kravchenko, K., Varga, József, Szabados, László   +6 more
core   +1 more source

Diagnostic of the Symbiotic Stars Environment by Thomson, Raman and Rayleigh Scattering Processes

Acta Polytechnica CTU Proceedings, 2015
Symbiotic stars are long-period interacting binaries consisting of a cool giant as the donor star and a white dwarf as the acretor. Due to acretion of the material from the giant’s stellar wind, the white dwarf becomes very hot and luminous.
M. Sekeráš, A. Skopal
doaj   +1 more source

Multi-periodic photospheric pulsations and connected wind structures in HD64760

, 2006
We report on the results of an extended optical spectroscopic monitoring campaign on the early-type B supergiant HD 64760 (B0.5 Ib) designed to probe the deep-seated origin of spatial wind structure in massive stars.
A. Kaufer, Stahl, O., R. K. Prinja, Prinja, R.K., D. Witherick, Witherick, D., O. Stahl, Kaufer, A.   +7 more
core   +1 more source

The complex circumstellar environment of HD 142527 [PDF]

, 2011
Context. The recent findings of gas giant planets around young A-type stars suggest that disks surrounding Herbig Ae/Be stars will develop planetary systems.
Dominik, C., Tielens, A.G.G.M., Verhoeff, A.P., Astrophysics, Honda, M., A. G. G. M. Tielens, Afd Astrophysics begr 1/1/17, E. Pantin, Verhoeff, A. P., Tielens, A. G. G. M., Waters, L. B. F. M., L. B. F. M. Waters, Van Boekel, R., M. Honda, H. Fujiwara, Dougherty, S. M., Min, M., Waters, L.B.F.M., S. M. Dougherty, Mulders, G. D., R. van Boekel, Fujiwara, H., M. Min, Dougherty, S.M., A. P. Verhoeff, Bouwman, J., J. Bouwman, C. Dominik, Dominik, C.; id_orcid, Mulders, G.D., de Koter, A., Sub Experiment. Astrophysics begr 1/1/14, Pantin, E., A. de Koter, G. D. Mulders   +34 more
core   +1 more source

Circumstellar matter as detected by IRAS - Some systematics [PDF]

Symposium - International Astronomical Union, 1987
Most of the sources noted by the Infrared Astronomical Satellite are, as expected, more or less normal cool giant stars, but a very large number of objects of earlier spectral type were also picked up. These cases must involve, in a variety of ways, circumstellar gas and dust.
openaire   +1 more source

Circumstellar matter in the binary V Puppis

The Astrophysical Journal, 1976
Results are reported for Copernicus observations of the double-lined binary V Puppis in the wavelength region from 1155 to 1310 A with a resolution of 0.2 A. The sharp-lined UV absorption spectrum is found to provide a line of sight dominated by an apparently 'textbook' H II region in a Stromgren sphere surrounding the stars. Several characteristics of
D. G. York, B. Flannery, J. Bahcall
openaire   +1 more source